TY  - RPRT
TI  - Choosing an appropriate criterion for true or false conversion in serial tuberculin testing.
AU  - P De March-Ayuela
PY  - 1990
DO  - 10.1164/ajrccm/141.4_pt_1.815
UR  - https://pubmed.ncbi.nlm.nih.gov/2327645/
ID  - 2327645
ER  -